CN109813748A - The determination method of coal dust ash fusion point - Google Patents
The determination method of coal dust ash fusion point Download PDFInfo
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- CN109813748A CN109813748A CN201910105185.5A CN201910105185A CN109813748A CN 109813748 A CN109813748 A CN 109813748A CN 201910105185 A CN201910105185 A CN 201910105185A CN 109813748 A CN109813748 A CN 109813748A
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Abstract
The present invention relates to a kind of determination methods of coal dust ash fusion point, comprising the following steps: S1: coal dust sample to be measured is ground into fine powder, it is spare after sieving；S2: it is spare to be cooled to room temperature sealing until sample takes out after being ashed completely for the calcination in Muffle furnace by the sample after grinding；S3: the coal powder fraction that S2 is obtained carries out chemical analysis and/or fluorescence analysis, measures ash component chemical composition；S4: Factsage Thermodynamic Calculation Software is utilized, coal powder fraction component is obtained by Phase Equilibrium Calculation and is completely melt temperature；S5: the ash fusion point of coal dust is calculated according to preset formula.The present invention utilizes existing means, on the basis of a large amount of coal dust ash melt the regression analysis of characteristic test data and software calculated value, calculates coal powder fraction by Factsage Thermodynamic Calculation Software and is completely melt temperature, and then determine coal dust ash fusion point；The coal powder fraction that software calculates simultaneously is completely melt temperature also and can be used as one of the characterization parameter of coal powder fraction melting characteristic.
Description
Technical field
The present invention relates to technical field of energy utilization, and in particular to a kind of determination method of coal dust ash fusion point.
Background technique
Coal ash melting property, also known as ash fusion point refer to that coal ash reaches the temperature of molten condition at high temperature.Coal ash is coal in high temperature
The inorganic matter obtained after lower burning, the complex mixture being made of the minerals of crystalline state and glassy state.Due to each in coal ash
The amount and different melting points of kind ingredient are larger, therefore coal ash gradually melts during temperature is raised, in certain temperature range
Gradually changed from solid-state to liquid, there is no fixed melting temperatures.However, coal ash melting property is to burning of coal, gasification and liquefaction
The variation of coal ash form has a major impact in the process, is an important parameter for measuring coal quality.Iron and steel enterprise's iron-smelting process mistake
(liquid phase deslagging) requires raw material ash with higher molten in pulverized coal injection in blast furnace or coal-burning power plant's combusting coal fines technical process in journey
Melt temperature.Therefore, coal ash meltbility is studied angularly from components of coal ash, minerals preferably to regulate and control coal ash,
It is of great significance to the scope of application of expansion coal, mix and match low ash smelting point coal dust.
There is very close relationship between ash fusion characteristic and ash component, therefore domestic and foreign scholars melt coal ash
The relationship of characteristic and ash component is associated, and establishes various informative empirical equation.Associated parameter is mainly coal ash
Middle main component (SiO2、Al2O3、CaO、Fe2O3、MgO、K2O、Na2O and TiO2), the soda acid group when more mutual than, sial
The variables such as conjunction.Common empirical formulae is as follows:
(1) Viiicen has studied the relationship between the composition and ash fusion characteristic temperature of each regional coal ash of New Zealand,
A large amount of parameter is defined, by the methods of regression analysis, establishes the grey melting temperature of prediction of suitable different regions coal
Equation.Wherein, the preferable equation of comparison prediction effect are as follows:
AFT=1934-13.7B-9.9SiO2+30FA+2.9CaO+40K2O-0.51Al2O3·MgO
In formula, B=CaO+MgO+FeO+Na2O+K2O+etc.；
FA=(SiO2+TiO2+P2O5+B2O3)/Al2O3。
(2) Winegarter etc. to the coal seam sample of Middle West alliance and the U.S., Illinois, the central and east the 6th
Number coal seam is studied, and has investigated influences of multiple association coal characteristic parameters to grey melting temperature through a large number of experiments, and
52 association independent variable parameters finally have been determined, have established the empirical equation of prediction coal ash melting temperature:
In formula:
A=SiO2+Al2O3+TiO2+P2O5；
B=Fe2O3+CaO+MgO+K2O+Na2O。
(3) 85%movement parameter is introduced and is established pre- using Australian coal sample as research object by Hakan etc.
Survey formula:
85%movement=1340 × lgAl2O3-251×lgFe2O3-106×lgCaO-172
FT=0.903 × 85%movement+158
(4) Dai Aijun has studied the influence of main composition and soda acid comparison ash fusion characteristic in coal ash, establishes pre-
The empirical model of flow measurement dynamic temperature:
FT=1463.055-876.865x+181.350x2-33.485x3+2.736x4-0.083x5
In formula:
It is all the empirical equation that domestic and foreign scholars establish for the relationship of coal ash and ash component above.And work as
The preceding domestic method for determining coal dust ash fusibility mainly has: national standard " measuring method of coal ash melting property " (GB/T219-
1996), patent of invention " the coal ash fusion temperature prediction technique based on ant group optimization BP neural network model " (CN200710067875),
Patent of invention " based on construction-beta pruning hybrid optimization rbf network coal ash fusion temperature prediction technique " (CN101968832B) etc.；It is above-mentioned
Two patents of invention, which are all based on coal powder fraction chemical component, to be established data model and predicts its ash fusion point, application range and
Forecasting accuracy is difficult to ensure, and needs mass data basic, is unfavorable for industrial practical application.So the country is generally adopted at present
Coal ash melting property is determined with national standard；But the experimental method pulverized coal consumption in national standard is big, the single experiment period is long, simultaneously also
Many experiments are wanted to determine the average value of the molten characteristic temperature of ash；During the mixed coal of actual industrial scene, if to every kind of Coal Blending Schemes
Measuring is all carried out, workload is greatly and the experimentation time is long, is unfavorable for the timely scheduling at cooperation scene.Simultaneously as
For the ash fusion point sensing equipment limiting temperature that the current country uses at 1500 DEG C or so, most equipment can not measure 1400 DEG C or more
The molten characteristic of ash melts characteristic the high requirements on the equipment using national standard measurement coal dust ash.
To sum up, a kind of determination method for providing novel coal dust ash fusion point is of great significance.
Summary of the invention
For the defects in the prior art, the present invention is intended to provide a kind of determination method of coal dust ash fusion point.The present invention is
Coal powder fraction characteristic melting temperature provides a kind of new and easier method；It influences melt characteristic in chemical constituent
Guidance of principle under, using Factsage Thermodynamic Calculation Software, by Phase Equilibrium Calculation, it is completely molten to obtain coal powder fraction component
Change temperature, characteristic is melted by its ash for characterizing coal dust；Simultaneously by the regression analysis of experimental data and calculating data, coal dust is established
Ash content is completely melt the relational expression between temperature (liquidus temperature) software calculated value and the molten characteristic test value of ash, helps industry spot
Simplicity determines coal dust ash fusion point, instructs actual production.
To achieve the above object, the present invention the following technical schemes are provided:
In a first aspect, the present invention provides a kind of determination method of combustible mineral ash fusion point, the determination method of ash fusion point is utilized
Factsage Thermodynamic Calculation Software obtains combustible mineral ash component by Phase Equilibrium Calculation and is completely melt that temperature, characterization can
The ash for firing mineral melts characteristic；Characteristic test data are melted by combustible mineral ash later and software calculates the regression analysis of data, are built
Vertical combustible mineral ash content is completely melt the relational expression between temperature software calculated value and the molten characteristic test value of ash, finally determines flammable
The ash fusion point of mineral.
Preferably, the determination method of combustible mineral ash fusion point, comprising the following steps: S1: combustible mineral sample to be measured is ground
Fine powder is worn into, is sieved for subsequent use later；S2: the calcination in Muffle furnace by the sample after grinding takes out ash until sample is ashed completely
Divide sample, be cooled to room temperature later, seals spare；S3: the combustible mineral ash content that S2 is obtained carries out chemical analysis and/or fluorescence
Analysis measures ash component chemical composition；S4: Factsage Thermodynamic Calculation Software is utilized, is obtained by Phase Equilibrium Calculation flammable
Mineral ash component is completely melt temperature；S5: calculated combustible mineral ash content is completely melt temperature, according to formula TST
=0.7098TC+ 257.98, the ash fusion point of combustible mineral is calculated；Wherein, TSTFor the ash fusion point of combustible mineral, TCTo pass through
The combustible mineral ash content that software is calculated is completely melt temperature.
Preferably, in S1: the combustible mineral sample powder after grinding is crossed 200 meshes.
Preferably, in S2: the temperature of calcination is 815 ± 10 DEG C, time 2h.
Preferably, in S4: Factsage Thermodynamic Calculation Software for polynary polyphase equilibrium calculating, phasor, thermodynamical analysis,
PH-Electric Potential Graph is calculated to be handled with drafting, thermodynamic optimization, mapping.
Preferably, combustible mineral includes one of coal dust, coke, semi-coke and biomass char or a variety of, and preferably coal
Powder.
Second aspect, method provided by the invention is during determining the ash fusion point of coal dust, coke, semi-coke and biomass char
Application, and especially determine coal dust ash fusion point during application.
Technical solution provided by the invention, have it is following the utility model has the advantages that
(1) there is special close relationship between coal ash and phase equilibrium properties, according to liquidus temperature, coal ash mine
The differentiation of object composition and the relationship of coal ash can determine coal ash melting temperature.The present invention is based on coal powder fraction chemistry at
Point, go out coal powder fraction ingredient constituent element using Factsage Thermodynamic Calculation Software Phase Equilibrium Calculation function calculating and generates liquid phase process
In be completely melt temperature, and calculated result and coal ash are connected, thus Accurate Prediction coal ash melting temperature；
The relationship for probing into software calculated result and measured value of experiment simultaneously, establishes coal powder fraction and is completely melt temperature (liquidus temperature) software
Relational expression between calculated value and the molten characteristic test value of ash.
(2) traditional ash fusion point measurement experiment is cumbersome, takes a long time；Office of the ash fusion point sensing equipment due to itself simultaneously
It is sex-limited, can not coal dust ash more than Accurate Determining equipment limiting temperature melt characteristic.And the present invention utilizes existing means, a large amount of
On the basis of coal dust ash melts the regression analysis of characteristic test data and software calculated value, by Factsage thermodynamic software, accurately
Calculated coal powder fraction is completely melt that temperature can also be used as an index of characterization coal powder fraction melting characteristic, is based on simultaneously
Lot of experimental data determine coal dust Empirical Equations For Calculating The Fusion Temperature of Coal Ash can help industry spot quickly determine coal dust ash fusion point.
(3) coal powder fraction proposed by the present invention is completely melt temperature and coal dust ash fusion point two indices, can be very good anti-
Coal powder fraction melting characteristic is reflected, the evaluation of objective is made to coal powder fraction melting characteristic, instructs industrial production.In addition, this
Inventive method is used not only for the determination of coal dust ash fusion point, while can also be used to determine other combustible minerals, such as coke, semi-coke
It is determined with the ash fusion point of biomass char etc..
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is to calculate coal powder fraction in the embodiment of the present invention to be completely melt that the module of temperature selects schematic diagram；
Fig. 2 is to calculate coal powder fraction in the embodiment of the present invention to be completely melt that the database of temperature selects schematic diagram；
Fig. 3 is that the input schematic diagram for being completely melt coal dust main ash content constituent element when temperature is calculated in the embodiment of the present invention；
Fig. 4 is the selection signal that coal powder fraction is completely melt possible reaction product when temperature computation in the embodiment of the present invention
Figure；
Fig. 5 is the schematic diagram of calculation result that coal powder fraction is completely melt temperature in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described.Implement below
Example is only used for clearly illustrating technical solution of the present invention, therefore is intended only as example, and cannot be used as a limitation and limit this hair
Bright protection scope.
Experimental method in following embodiments is unless otherwise specified conventional method.Examination as used in the following examples
Material is tested, is to be commercially available from conventional reagent shop unless otherwise specified.Quantitative test in following embodiment, is all provided with
Three repeated experiments are set, data are the average value or mean+SD of three repeated experiments.
The present invention provides a kind of determination method of coal dust ash fusion point, comprising the following steps:
S1: by the coal dust bulky grain buck of selected test at fine powder, crossing 200 meshes later, spare.
S2: it will be put into Muffle furnace equipped with coal dust sample cupel or corundum crucible, calcination under the conditions of 815 ± 10 DEG C of temperature
2 hours, coal dust took out after being ashed completely, and ash content sample is cooled to room temperature, and sealed spare.
S3: carrying out chemical analysis or fluorescence analysis to coal powder fraction obtained, measure its ash component chemical composition,
S4: ash content is carried out using the Phase Equilibrium Calculation function of Factsage Thermodynamic Calculation Software and is completely melt thermometer
It calculates；
S5: temperature is completely melt using the combustible mineral ash content being calculated, according to formula TST=0.7098TC+
257.98, the ash fusion point of combustible mineral is calculated；In formula, TSTFor the ash fusion point of coal dust, TCIt is calculated by software
The coal powder fraction is completely melt temperature.
It should be noted that the calculated ash content of step S4 is completely melt that temperature can also be used as coal powder fraction melting characteristic
A characterization temperature, but industry spot is commonly the ash fusion point of coal dust.Formula in step S5 is to utilize side of the invention
The calculated a large amount of coal powder fractions of method are completely melt the experimental result of temperature with (GB/T219-1996) according to national standards measurement
What regression analysis obtained, it can help quickly to determine coal dust ash fusion point in industry spot application.
It is illustrated With reference to embodiment:
The present embodiment provides a kind of determination methods of coal dust ash fusion point, comprising the following steps:
S1: selecting 4 kinds of coal dusts (being respectively labeled as A, B, C and D) as laboratory sample, and 200 mesh are crossed after it is ground respectively
Sieve takes the lower coal dust of sieve spare.
S2: 4 kinds of coal dust sample cupels will be respectively provided with and be put into Muffle furnace, calcination 2 is small under the conditions of 815 ± 10 DEG C of temperature
When, it is spare to be cooled to room temperature sealing for 4 kinds of ash content samples of taking-up after coal dust is ashed completely.
S3: carrying out chemical analysis to 4 kinds of coal powder fractions obtained, measures its ash component primary chemical composition；Such as 1 institute of table
Show.
Main oxides content/wt% in 1 four kinds of coal powder fractions of table
S4: ash content is carried out using the Phase Equilibrium Calculation function of Factsage Thermodynamic Calculation Software and is completely melt thermometer
It calculates, the specific calculating process after opening Factsage Thermodynamic Calculation Software is as follows:
(1) computing module is selected --- selection Equilib module (see Fig. 1)
(2) database is selected --- selection FTOxid oxide database (see Fig. 2)
(3) input coal powder fraction composition
The main oxides in coal dust sample ash content due to calculating selection are by SiO2、Al2O3、Fe2O3, tetra- kinds of CaO oxidation
Object composition successively inputs in the interface of Fig. 3 by their constituent content according to (being shown in Table 1) after mass fraction percentage.
(4) possible reaction product is selected
In calculating parameter set interface, possible reaction product is selected, it is in selection product column that solid is pure first
Substance is all chosen, and " Select " key is then clicked, and all solution that FTOxid database retrieval comes out mutually all are chosen,
" Add all solutions from database " is selected in the dialog box exactly popped up after click " Select " key, so
Click " FToxid " afterwards.Fig. 4 calculates the schematic diagram of step thus.When calculating " being completely melt temperature ", mouse right-click is needed
" P " option (precipitate target is set by " FToxid-SLAGA " in liquid phase " Solution specice "
phase)。
(5) start calculate and as the result is shown
When " FToxid-SLAGA " in liquid phase " Solution specice " is set as " P " option (precipitate
Target phase) after, " Final Conditions " inner temperature columns are left a blank, the pressure of reaction system is filled in pressure column
" Calculate " is clicked after intensity values can carry out the calculating of coal powder fraction " being completely melt temperature ".Temperature in Fig. 5 in red frame is
For the checkout result of ash content " being completely melt temperature ", unit is DEG C.
The ash fusion point of S5:4 kind coal dust is according to formula TST=0.7098TC+ 257.98 are calculated, in formula, TST、TCRespectively
Temperature (unit is DEG C), software calculated result are completely melt for the ash fusion point of coal dust and by the coal powder fraction that software is calculated
2 are shown in Table with experimental result comparison.
2 software calculated result of table and experimental result
As can be seen from Table 2: present invention determine that coal dust ash fusion point and measuring ST temperature value (ash fusion point) difference
It less, can be with accurate characterization coal dust ash melting temperature value.Further, since the limiting temperature of experimental facilities is not high enough, so
1400 DEG C or more of ash fusion state can not equipment needs to rise by experimental judgment, while during ash fusion characteristic test
Mild cooling, experimental period is long, this is also an advantage of the present invention compared to measuring, be exactly can efficiently, it is quick and
It is accurate to calculate the temperature that melt is completely melt under high temperature, it avoids cumbersome ash fusion characteristic test and does not have to consider that experiment is set
Standby limiting temperature provides new method for coal ash melting temperature prediction.
Certainly, the case where being enumerated in addition to above-described embodiment, parameter, the selection of process object etc. in other treatment processes
It is possible.
The present invention provides a kind of new and easier method for coal powder fraction characteristic melting temperature；It is in chemical constituent
Under the guidance of principle for influencing melt characteristic, coal is obtained by Phase Equilibrium Calculation using Factsage Thermodynamic Calculation Software
Powder ash component is completely melt temperature, melts characteristic by its ash for characterizing coal dust；Pass through experimental data and calculating data simultaneously
The pass that coal powder fraction is completely melt between temperature (liquidus temperature) software calculated value and the molten characteristic test value of ash is established in regression analysis
It is formula, helps industry spot simplicity to determine coal dust ash fusion point, instruct actual production.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.Unless specifically stated otherwise, it otherwise illustrates in these embodiments
Component and opposite step, numerical expression and the numerical value of step are not limit the scope of the invention.It is illustrated and described herein
In all examples, unless otherwise prescribed, any occurrence should be construed as merely illustratively, not as limitation, because
This, other examples of exemplary embodiment can have different values.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover in protection scope of the present invention.
Claims (7)
1. a kind of determination method of combustible mineral ash fusion point, it is characterised in that:
The determination method of the ash fusion point utilizes Factsage Thermodynamic Calculation Software, obtains combustible mineral by Phase Equilibrium Calculation
Ash component is completely melt temperature, and the ash for characterizing combustible mineral melts characteristic；Characteristic test is melted by the combustible mineral ash later
Data and software calculate the regression analysis of data, establish combustible mineral ash content and are completely melt temperature software calculated value and the molten characteristic of ash
Relational expression between experiment value, the final ash fusion point for determining combustible mineral.
2. the determination method of combustible mineral ash fusion point according to claim 1, which comprises the following steps:
S1: combustible mineral sample to be measured is ground into fine powder, is sieved for subsequent use later；
S2: the calcination in Muffle furnace by the sample after the grinding is taken out ash content sample, is cooled down later until sample is ashed completely
To room temperature, seal spare；
S3: the combustible mineral ash content that the S2 is obtained carries out chemical analysis and/or fluorescence analysis, measures ash component chemical group
At；
S4: Factsage Thermodynamic Calculation Software is utilized, combustible mineral ash component is obtained by Phase Equilibrium Calculation and is completely melt
Temperature；
S5: temperature is completely melt using the combustible mineral ash content being calculated, according to formula TST=0.7098TC+
257.98, the ash fusion point of the combustible mineral is calculated；
Wherein, TSTFor the ash fusion point of combustible mineral, TCThe combustible mineral ash content to be calculated by software is completely melt
Temperature.
3. the determination method of combustible mineral ash fusion point according to claim 2, it is characterised in that:
In the S1:
Combustible mineral sample powder after the grinding is crossed into 200 meshes.
4. the determination method of combustible mineral ash fusion point according to claim 2, it is characterised in that:
In the S2:
The temperature of the calcination is 815 ± 10 DEG C, time 2h.
5. the determination method of combustible mineral ash fusion point according to claim 2, it is characterised in that:
In the S4:
The Factsage Thermodynamic Calculation Software is calculated by polynary polyphase equilibrium, based on phasor, thermodynamical analysis, pH-Electric Potential Graph
It calculates and is handled with drafting, thermodynamic optimization, mapping.
6. the determination method of described in any item combustible mineral ash fusion points according to claim 1~5, it is characterised in that:
The combustible mineral includes one of coal dust, coke, semi-coke and biomass char or a variety of, and preferably coal dust.
7. any one of claim 1~6 the method is in the ash fusion point for determining coal dust, coke, semi-coke and/or biomass char, and
Especially determine the application during coal dust ash fusion point.
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| CN112881455A (en) * | 2021-01-15 | 2021-06-01 | 山西格盟中美清洁能源研发中心有限公司 | Method for predicting coal ash melting temperature based on mineral phase and neural network composite model |
| CN112881455B (en) * | 2021-01-15 | 2024-03-12 | 山西格盟中美清洁能源研发中心有限公司 | Method for predicting coal ash melting temperature based on mineral phase and neural network composite model |
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